Excavator.



R. R. HATCHETT.

EXGAVATOR.

APPLIGATIQN FILED 11111.25, 1912.

3 SHEETS-SHEET 1.

CBLLIMBIA PLANomgAPH c0,. WASHINGTON, D, cA

Patented 1190.111912.

R. R. HTGHETT.

EXGAVATOR.

APPLICATION FILED JAN. 25, 1912.

l Patented Dec. 17,1912.

3 SHEETS-SHEET 2,

O @no R. R. HATCHEIT.- EXGAVATOR.

APPLICATION FILED JAN. 25, 1912.

Patented Desir 17, 1912.

s SHEETS-SHEET s.

d. QN

QLUMBIA PLANOURAPH c0,. WASHINGTON, D. cA

UNITED STATES VPMlilSrIfo'11H10E;

`noir It. HATCHETT, or Los Attentes, chantrenurA.,-

ExcAvAToR.

Specification of Letters Patent.

To all 'whom t may concern Be it known that I, ROY R. HATCHETT,

a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and Statel of California, have invented cer" tain new .and useful' Improvements in Ex# y Y cavators; and I .dok declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in they art to which it appertains to make and use the same. Y

This invention relates to excavating,-and' more especially to machines of that kind which employ a kdipper; and the object .of

the 4same is to adapt a machine of this char-v f acter for working in narrow cuts ork tunnels,

o-r tunnels with low roofs 'so that 4the space is restricted both laterally and vertically. This object .is accomplished by the construction hereinafter more fully described and claimed and as shown in the drawings whereins Figurel 1s a sidefelevation of the machine y with the framework omitted for thesake yof clearness, .and the bucket shown in various positions. Fig. 2 is a plan view of the same. Fig. 3 is a rear view, partially in section, showing the machine in ay tunnel.

- is jajperspective detail o-f the platform car soL riage in position therein. Fig. 8 is a per vspective detail of theright hand platform shown in Fig. 3, illustrating ythe foot mechanism for manipulating the sprocket for turning the frame on its pivots.

In Fig. 3 ofthe drawings is shown a tun- T nel T along whichis laid ka track consisting lof rails R which are portable so that thel track can be extended as thel tunnelgrows, and on this track R nearits yforward end ltravels a platform car yP which carries the excavator,v and in rearof the,v same a dump e car D into which the material excavated is dumped and by which it may be removed out of the tunnel from time to time and an empty dump car substituted-all as perhaps best seen in Fig. 1. While the machine would operate with yequal success in a narrowfditch which was open at the top, it will be seen from Fig. 3 that there is not' much space transversely ofthegcut in which the Fig. 4.

Fig.

machine Works andit will -be impossiblev to run the dump car to; one side of thek platformr car inganylevent; hencejI provide for j e f carryingthe materia-l excavated over the top of the-.machine and dropping `it into a vdump car which travels on the 4same track `in. rear .of theplatform car P, and in orderto `carry out this general scheme the machine is built accordingly'.v '1. v f n f A From the platformfl of the .carjP rises a framework 2 which carries an overhead bearing 3,` and upon the platform-isl-mount'- Patented Dec. 1"?, 1,912. Application i1ed Januaryv 25, 1912. Serial No.V 673,415. i l

ed a turn tableconsisting ofla circular track f 'carry-ing at its center ,a stepbearing 4 which is directly beneathlthe overheadbearing 3-all `as best seen in Fig. 4. In said bearings are mounted the stub shafts 6` of f the frame 7 rwhich supports the boom y8 ,and its companion parts, a disk'9 traveling Vupon the track 5 of the turn table as willgbey clear. The frame 7.(carries axtoothed sector y 10 engaged by a worm'll'which is fast on a shaft 12 that finds its support in Ybearings,

13 rising from-the platform 1,'and1saidshaft carries a sprocket 14 connected by vva chain 15 to a sprocket 16 whose yrotation is controlled yby a foot lever 17 capable ofbeing y manipulated by a workman who `stands on e n a platform. 18 which projects to one side of the car P as best seen in Fig. 3.y v

The scoop or bucket20 ijs mountedfast at the lower end of a pole 21`whose upper .end is "pivotally connectedv with a. carriage best seen iny Fig. 6. This carriage comprises a frame 22 whereon are ,journaled `several wheels 23j adapted to travel betweentracks 2tsupported y'by `the boom 8 as best seen in Fig. 7 this boom being'by preference made mostly of angle iron` as there illustrated. Said carriage/.also has eyes 25at `its front and rear,-andfrom-the former ,leads a rope i 26, which may be well called the forward line, that extends overa sheave 27 at the front end of 4the .boom 8, thenceback .and over sheaves28 and 29 carried at the topof the frame 2, and `to the winding drum 30 of a motor' which is under thecontrol ofthe ico workman standing upon said Aplatform 18,.

Another .rope `36, which mayrwell be called the dafter line, leads from the rearmost eye 25 on the carriage, over a sheave 37 at the rear extremity thereof, and (thence (inward and over other sheaves 38 and 39 and vdownward to .the same winding drum 30 laround which itgjpasses in theopposite `4`directionl Henceit will beseenfthatthe workman by manipulating the motor controllingVV the drum 30, may cause the carriage to move backward and forward upon and between the tracks 28 within the bo-om 8, and with the carriage moves the pole 21 and bucket 2O as will be understood. Another rope 46, which may well be called the tackle line, leads around pulley blocks 47 connected respectively with the front end of the boom and with the bucket, thence to the rear and over a sheave 48 carried upon the frame 2, and thence downward to the winding drum 40 of an independent motor mounted upon a second platform 46 which is supported from the car l? at the opposite side from said platform 18 and therefore balances it. It will not be necessary to amplify the construction of the motors, but by preference they will be driven by compressed air which is always present in a mine, or if it is a ditch that is being dug they can well be electric motors provided only that their control mechanism leads to within reach of the operator illustrated in Fig. 3 if there be but one operator, or is of such character that it may be manipulated by two operators, one standing on either platform and thus balancing the machine upon the rails R. Finally guides 50 of L-iron are carried by the frame 7 and are spaced apart a suiiicient distance to permit the bucket 20 to slide upon them as indicated in its various dotted positions in Fig. 1.

In operation the workman takes his place as shown in Fig. 3, or if there be two workmen one stands on each platform, the car P is moved forward on the rails R until it is in position to operate as may be required, and a dump car D is passed behind the platform car P into about the position shown in Fig. 1. By properly manipulating the motors, the bucket 2() is then caused to take the position here shown. The carriage-controlling engine is then caused to remain stationary and the hoist engine started so that its drum 40 draws in the tackle line 46 and the bucket 20 is elevated, swings outward around the carriage as a center, and moves upward so that it scrapes the material into its open mouth. When the tackle has raised the bucket as high as may be required and it is reasonably full, the hoist engine is stopped and the carriage engine started in a proper direction to draw upon the after line 36 and pay out on the forward line 26 so that the carriage moves to the rear to the first dotted line position in Fig. 1, at which time the bucket 20 strikes the front ends of the guides 50 as shown. The hoist engine is then reversed to pay out on the tackle line 46, and a continuation of the movement of the bucket-engine draws the bucket 20 and pole 21 farther to the rear as shown in the left hand dotted position in Fig. 1, the bucket traveling upward and rearward along the guides 50 until it reaches the point indicated, when itsdoor flies open either automatically or by means of some trip and its contents is delivered into the dump car D. A reversal of the operation moves the bucket back to its point of starting, and the operation is repeated; but just before its repetition the workman manipulates the treadle 17 to turn the sprocket 16 and through the chain 15 the sprocket 14, whereby the worm is caused to move the toothed sector 10 and the entire device is swung or turned upon its pivot 6 so that the bucket in its next upward course along the earth is moved a little to one side and takes up a new charge or a charge up a new path.

Further amplification of the uses of this machine will be unnecessary to those skilled in the art. Attention is directed, however, to the fact that the load scooped up by the bucket is passed first to the rear and to a position where the bucket strikes the front ends of the guides 50 so that the latter take the weight of the bucket and its contents off of the tackle rope 46 and rod or pole 21, after which continued pull upon the after line 36 causes the travel of the bucket to the rear until it is dumped. But in its passage along said guides 50, the bucket moves through the skeleton frame 7 which supports the boom and through the frame-work 2 which supports said skeleton frame and is drawn, rather than being pushed or swung, almost straight to the rear and caused to rise only a trifle so that when it dumps its load the same can fall into a rather deep dump car D. Again, after dumping, movement of the bucket to resume its scraping operation is along the same course reversed; and hence it will be seen that this machine can operate in a narrow trench or tunnel, and if a tunnel then in one that is no higher than necessary to let the boom pass into it. The lateral platforms need be only sufhciently wide to hold one workman and the motor each, and two workmen can run this machine at considerable speed and will counterbalance each others weight. A

By preference t-he parts of this machine are mainly of metal, and their proportion and the details of construction are matters of no moment.

That is claimed as new is:

1. In an excavator of the type described, i

the combination with a support having a turn table, a skeleton framework on the suplowering the latter, andbucket-giiides ext-ending throughy said skeleton frame and upon which the bucket rides as it passes to and fro.

2. In an excavator of the type described, the combination with a support having a turn table, a skeleton framework onthe s up port, and alined bearings at the center of said turn table and in the top of said frame* work; of a skeleton frame having stub shafts journaled in said bearings, means for turningL said frame in eitherdirection, a boom extending throughsaid frame and having a track, a carriage thereon, means for moving it to andfro, a bucket, a pole connecting the carriage and bucket,`ineans for raising and lowering the latter, and bucket-guides extending through said skeleton frame and upon which the bucket rides as it passes to andyfro. n

3. In an excavator of the type described, the combination with a support, a skeleton frame, means for mounting it on a vertical pivot thereon, and a boom extending through said frame and having a track; of

` a carriage movable on said track, a forward line and an after line leading fro-in said carriage over sheaves at the frontv and rear ends respectively of said boom, a carriageengine having a winding drinn around which said lines are led in opposite directions, a pole connected with said carriage,

a bucket on the pole, pulley blocks connected wit-h the boom and bucket respec- Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patentsj and a hoisting-engine to whose drum said* line in connected,

4. In an excavator of the type described, the combination with a support having a turn table, a skeleton framework on the sup-r port, and alined bearings at the center of said turn table and in the top lof said framework; of a skeleton frame having` stub shafts Journaled in said bearings, means for swing-k ing the frame on its shafts, a boom extending through said frame and having a track, a carriage movable on said traokand having eyes, a forward line and an after line leading from said eyes over sheaves at the front and rear ends respectivelyfof said boom,a carriage engine having a winding drum around which said lines are led in opposite f directions, a pole connected with said carriage, a bucket on the pole, pulley blocks connected with the beam and bucket respec? tively, ya tackle line leading around said blocks and over sheaves along the boom, and a hoisting engine to whose drum said line isconnected. n

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

nov ia. HATCHETT;

Witnesses HARRY A. HoLLYEs, O. MoRToN.

Washington, D. C. 

